Improvement in metallic seals



BROOKS..

METALLIC SEAL.

Patented.` July 3,1 877.

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N PETERS. PHOTO-LITHOGRAFHER, WASHINGTON; n C.

EDWARD J. BROOKS,

IMPROVEMENT IN OF NEW YORK, N. YQ

METALLIC SEALS.

Specification forming part of Letters Patent No. 192,735, dated July 3, 1877 application filed June 22, 1877.

cable to different forms of metallic shackles for the described typeof seals, the same being formed by simple transverse bends, compressed or flattened so as to retain their shape, and adapted to be very quickly and cheaply produced.

The improvement consists, secondly, in stop projections or enlargements formed on or applied to the ends of the shackle lat proper points to locate the anchoring projections within the seal-disks. The form of these projections or enlargements is not essential, and they are obviously applicable to all metallic shackles which carry their own anchoring devices of any form where the latter have to be located in the seal-disks. Said stop projections obviate any necessity for seal-disks hav ing threading-holes of peculiar shape, and they greatly facilitate adjusting the seal preliminary to pressing.

Referring to the drawing, Figure l is a perspective view of the parts of a metallic seal illustrating thisinvention. Fig. 2 is a sectional elevation of the same united and pressed. Fig. 3 is a sectional elevation of another pressed seal, illustrating certain modilications of the shackle, and the employment of a different seal-disk. Figs. 4 to 7, inclusive, are elevations of metallic shackles, illustrating additional modifications.

-Likeletters of reference indicate corresponding parts in the several figures This improved seal, under any ofV its modications, will consist of a metallic shackle, S, adapted to be passed through or around the parts of a lock or fastening, or otherwise to embrace or unite the parts whose separation is to be prevented or detected, and a softmetal seal-disk, D, adapted to be pressed upon the ends of the shackle, so as to permanently uni-te the same and constitute the seal proper.

S S2 S3 S4 S5 S6 represent a number of shackles, each embodying one or both of the features of my present improvement.

a a represent lateral projections, formed by compressed transverse bends or doublings y'of the shackle at .proper poi-nts to serve 'as anchors on the respective ends of the shackle within the seal-disk. These projections may be quickly formed, either by hand or by machinery, and the thinnest and weakest wire that can be desired will receive them. A light tap of the hammer, or its equivalent, after each bend of the malleable metal, imparts the linal shape, so that it will be retained. In use, these anchoring projections form very ei'ective holds, as they oppose distinct shoulders to the Withdrawal ofthe shackle, while they are adapted to be very readily inserted. The employment of two or more anchoring projections on each end of the shackle is illustrated in Figs. 3 and 4, andthe former illustrates also the employment of a space between duplicate projections to facilitate interlocking them with each other, as in my crossed-aperture seal-disk, patented March 30, 1875, one of which is shown at D2, Fig. 3. Either single or double, the projections are adapted to engage with an anchor cast in the seal-disk, as in the safety and cross-wire seals, patented, respectively, September 1, 1874,-and September 7, 1875.

b b represent supplemental' lateral projections or enlargements, which, in the illustration, are single coils, with their'axes at right angles to those of the shackles on which they are formed. The object of these projections is to locate the anchoring projections a, or any similar anchoring devices, within the sealdisk, by contact with the upper edgeof thedisk, as illustrated in Fig. 2, being made of sufficient size or sufficiently prominent not to enter the threading-apertures.

The shackles S to S4, inclusive, are of single Wire.

Fig. 6 illustrates the application ofthe projections to twisted shackles of two or more strands. The illustrative shackle S5 is composed of three wires of different thickness, for the purpose of forming concavities superior to those of the ordinary twist, composed of uniform wires, and, more particularly, to insure the detection of attempts to strip the seal by providing a very weak wire, which will be sure to break under a less strain than will suffice to withdraw either end of the shackle. The shackle S6, Fig. 7, is of sheet metal, which is peculiarly adapted to receive the described form of anchoring projections.

in the form of hooks for the same general purpose. None of these devices are included in my present invention, andan extension of the shackle ends beyond the anchoring projections, as above described, is considered im portant and essential.

The following is what I claim as new and of my own invention, and desire to secure by Letters Patent, namely:

1. A metallic shackle having lateral anchoring projections formed by repeated transverse bends or folds, and compressed or flattened to preserve their shape, the ends of the shackle being extended beyond said projections in the form of guides, substantially as herein shown and described.

2. A metallic shackle having the stop projections or enlargements thereon, and smaller or less prominent anchoring devices between said stop projections and its extremities, substantially as hereinshown and described, for locating said anchoring devices within the seal-disk, in the manner set forth. Y

E. J. BROOKS.

Witnesses:

J As. L. EwIN, J. E. SCHERMERHOBN. 

